Poinsettia plant named ‘Duespotwi’

ABSTRACT

A new and distinct cultivar of Poinsettia plant named ‘Duespotwi’, characterized by its inflorescences with pale yellow-colored flower bracts; dark green-colored leaves with green-colored petioles; uniform and rounded plant habit; early flowering; and excellent post-production longevity.

BOTANICAL CLASSIFICATION/CULTIVAR DENOMINATION

Euphorbia pulcherrima Willd. cultivar Duespotwi.

BACKGROUND OF THE INVENTION

The present Invention relates to a new and distinct cultivar of Poinsettia plant, botanically known as Euphorbia pulcherrima Willd., and hereinafter referred to by the name ‘Duespotwi’.

The new Poinsettia is a product of a planned breeding program conducted by the Inventor in Rheinberg, Germany. The objective of the breeding program is to create new Poinsettia cultivars with uniform plant habit and attractive flower bract coloration.

The new Poinsettia is a naturally-occurring whole plant mutation of the Euphorbia pulcherrima Willd. cultivar HWD Spotlight, disclosed in U.S. Plant Pat. No. 9,854. The new Poinsettia was discovered and selected by the Inventor as a single plant within a population of plants of the cultivar HWD Spotlight in a controlled environment in Rheinberg, Germany. The selection of this plant was based on its attractive flower bract coloration and uniform plant habit.

Asexual reproduction of the new Poinsettia by vegetative terminal cuttings taken at Rheinberg, Germany, has shown that the unique features of this new Poinsettia are stable and reproduced true to type in successive generations of asexual reproduction.

BRIEF SUMMARY OF THE INVENTION

The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘Duespotwi’. These characteristics in combination distinguish ‘Duespotwi’ as a new and distinct cultivar:

1. Inflorescences with pale yellow-colored flower bracts.

2. Dark green-colored leaves with green-colored petioles.

3. Uniform and rounded plant habit.

4. Early flowering; response time, about eight weeks.

5. Excellent post-production longevity.

Compared to plants of the parent, the cultivar HWD Spotlight, plants of the new Poinsettia are more freely branching and have fewer cyathia per corymb. In addition, plants of the new Poinsettia and the cultivar HWD Spotlight differ in flower bract coloration as plants of the cultivar HWD Spotlight have red-colored flower bracts.

Plants of the new Poinsettia can be compared to plants of the cultivar Cortez White, not patented. In side-by-side comparisons conducted in Rheinberg, Germany, plants of the new Poinsettia differed from plants of the cultivar Cortez White in the following characteristics:

1. Leaves and flower bracts of plants of the new Poinsettia were more rugose than leaves and flower bracts of plants of the cultivar Cortez White.

2. Plants of the new Poinsettia had smaller flower bracts than plants of the cultivar Cortez White.

BRIEF DESCRIPTION OF THE PHOTOGRAPH

The accompanying colored photograph illustrates the overall appearace of the new Poinsettia, showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photograph may differ slightly from the color values cited in the detailed botanical description which accurately describe the colors of the new Poinsettia. The photograph comprises a side perspective view of a single flowering plant of ‘Duespotwi’ grown in a container.

DETAILED BOTANICAL DESCRIPTION

The new Poinsettia has not been observed under all possible environmental conditions. The phenotype may vary somewhat with variations in environment such as temperature, daylength and light intensity, without, however, any variance in genotype.

The aforementioned photographs, following observations and averaged measurements describe plants grown in Rheinberg, Germany during the winter under commercial practice in a glass-covered greenhouse with day and night temperatures about 22° C. and light levels about 4,500 foot-candles. Single plants were grown in 14-cm pots and pinched once. Plants were flowered under natural season short day/long night conditions. Plants were about 16 weeks from unrooted cuttings when the photographs and the detailed botanical description were taken.

In the following description, color references are made to The Royal Horticultural Society Colour Chart, 1995 edition, except where general terms of ordinary dictionary significiance are used.

Botanical classification: Euphorbia pulcherrima Willd. cultivar Duespotwi.

Parentage: Naturally-occurring whole plant mutation of the Euphorbia pulcherrima Willd. cultivar HWD Spotlight, disclosed in U.S. Plant Pat. No. 9,854.

Propagation:

Type cutting.—Vegetative terminal cuttings.

Time to initiate roots.—Summer: About 9 days at 22° C. Winter: About 13 days at 22° C.

Time to develop roots.—Summer: About 21 days at 22° C. Winter: About 28 days at 22° C.

Root description.—Thick, fibrous and freely-branching.

Plant description:

Plant form.—Inverted triangle, top of plant rounded.

Growth habit.—Upright and uniform plant habit.

Plant height.—About 24 cm.

Plant diameter or spread.—About 48 cm.

Lateral branch description.—Quantity per plant: About five to seven lateral branches develop after pinching. Length: About 17 cm. Diameter: Less than 1 cm. Internode length: About 1.75 cm. Color: 137B.

Foliage description.—Arrangement: Alternate, single. Quantity of leaves per lateral branch: About nine. Length: About 8.2 cm. Width: About 6.3 cm. Shape: Mostly ovate with irregular lobing. Apex: Acuminate to apiculate. Base: Obtuse. Margin: Entire with irregular lobing. Venation pattern: Pinnate. Texture, upper and lower surfaces: Glabrous. Surface: Rugose. Color: Young and fully expanded foliage, upper surface: 136A. Young and fully expanded foliage, lower surface: 137B. Venation: Upper surface: 138B. Lower surface: 138C. Petiole: Length: About 4.3 cm. Diameter: About 2 mm. Texture: Glabrous. Color, upper and lower surfaces: 144B.

Inflorescence description:

Inflorescence type and habit.—Inflorescences are compound corymbs of cyathia with colored flower bracts subtending the cyathia. Inflorescences are not fragrant. Inflorescences persistent.

Natural flowering season.—Autumn/winter in Northern Hemisphere. Flower initiation and development is induced under long nyctoperiod conditions. Response time, about eight weeks.

Post-production longevity.—Plants of the new Poinsettia maintain good substance and bract color for about ten weeks under interior conditions and about 14 weeks under greenhouse conditions.

Quantity of inflorescences per plant.—One per lateral branch, about five to seven.

Inflorescence size.—Diameter: About 25.5 cm. Height (depth): About 3 cm.

Flower bracts.—Quantity of flower bracts per inflorescence: About 15. Length, largest bracts: About 7.9 cm. Width, largest bracts: About 5.9 cm. Shape: Mostly ovate with irregular lobing. Apex: Acuminate to apiculate. Base: Obtuse. Margin: Entire with irregular lobing. Texture, upper and lower surfaces: Glabrous, velvety. Surface: Rugose. Orientation: Mostly horizontal. Color: Developing bracts, upper and lower surfaces: 8C. Fully developed bracts, upper and lower surfaces: 11C; fading to 11D with subsequent development. Venation, upper and lower surfaces: Same as lamina. Bract petiole: Length: About 3 cm. Diameter: About 2 mm. Texture: Glabrous. Color: 144B.

Cyathia.—Quantity of cyathia per corymb: About 12. Diameter of cyathia cluster: About 2.5 cm. Length: About 6 mm. Diameter: About 5 mm. Shape: Ovoid. Color, immature and mature: 143B. Peduncle: Length: About 3 mm. Diameter: Less than 1 mm. Strength/aspect: Moderately strong, curved. Color: 143B. Stamens: Quantity of stamens per cyathium: About 15. Anther shape: Oval. Anther length: About 0.7 mm. Anther color: 6B. Amount of pollen: Moderate. Pollen color: 6B. Pistils: Quantity of pistils per cyathium: One. Pistil length: About 7 mm. Style length: About 3 mm. Style color: 143D. Stigma color: 144C. Nectaries: Quantity of nectaries per cyathium: One. Color: 154B.

Disease/pest resistance: Resistance to pathogens and pests common to Poinsettias has not been observed on plants grown under commercial conditions. 

It is claimed:
 1. A new and distinct cultivar of Poinsettia plant named ‘Duespotwi’, as illustrated and described. 